How much does a fiberglass pool cost? What's the price of a fiberglass pool? This, of course, is always one of the first questions a pool shopper has when . Fiberglass Pool Prices, Costs, Expenses, and other available Options. Buying a Fiberglass Pool is much like buying a car. The base price of 5000-5000 is just a starting point of your costs, features & add-ons. The cost of an inground pool is typically understated, with the average cost starting around 5000, which doesn't account for features, add-ons & maintenance. Cost…Usually cost is the first thing most people think about when planning to have a swimming pool installed. Our fiberglass pools are extremely affordable and .